Clamp for dental flasks



(No Model.)

M. R'. B. CRBERY.

CLAMP POR DENTAL FLASKS.

No. 478,312. Patented-July 5,1892.Y

UNITED STATES,

`PMfnNT GFFICE.

MORGAN RHEES'BANKS CREERY, OFEBENSBURG, PENNSYLVANIA.

CLAMP FOR DENTAL' FLASKS.

SPECIFICATION forming part of Letters Patent No. 478,312, dated July 5,1892. Application filed December 5, 1891.- Sencilla/114,133.' (Nomodel.)

T0 all wwm if may concern:

Be it known that I, MORGAN Runas BANKS CREERY, a citizen of the UnitedStates, residing at Ebensburg, in the county of Cambria and State of'Pennsylvania, have invented a new and useful Improvement in Clamps forDental Flasks,of which thefollowin g is a specication.

This invention relates to clamps for dental flasks; and it has for itsobject to provide an improved spring clamping device which can bereadilyadapted to anydental vulcanizingflask with but a slightalterationin the pattern and one which will be especially designed to equalize thepressure in forcing the flask members together upon Ithe rubber placedtherein.

With these and many other obj ects in view,

which will readily appear to those skilled in the art, the same consistsin the novel con-A struction, combination, and arrangement of partshereinafter more fully described, illustrated, and claimed.

In the accompanying drawings, Figure l is a perspective view of a dentalflask provided with a spring clamping plate constructed in accordancewith my invention. Fig. 2 is a vertical transverse section ot the same.Fig. 3 is a detail in perspective of the clampingplate detached. Fig. 4is a similar view of a simplied form adapted for another construction offlask.

Referring to the accompanying drawings, A represents a dentalvulcanizing-flask of well-known pattern and having the principal partsused in most all flasks ofV this character, and the same comprises theupper and lower flask members B, seated upon the base C and inclosedwithin the series of' upright posts D, arising from said base andholding the flask members thereon in any manner, according to theconstruction of the flask. The upper ends of' each of said posts, whichproject above the top of the upper flask member when the two are placedtogether, are provided with the notches or shoulders E.

A spring clamping plate or disk F is designed to be pivotally'mountedupon the top of the upper flask member and securely clamp said memberstogether, as is provided for by this invention. The said plate F isprovided with a pivot stud or pinfupon the underside thereof, that isadapted to engage the recess or opening f in the top of' the .upperflask member, and thus pivotally mounts said plate upon the top of theflask. The plate F is composed of spring metal to especially adapt itfor the purposes for which it is used and 1s provided with a series ofspring locking-bps G, bent upwardly, so that in turning said plate thespring-lips will simultaneously engage and slide beneath the notches orshoulders of the side posts of the flask, and thus cause the Vpressureto be evenly distributed and exerted upon the top of the flask tosecurely clamp the members thereof together and the rubbertherein,`asvwill be readily apparent. The

spring-plate F is further provided with an u pturned operating flange orflanges H, as shown in Fig.4, which may either be grasped by thefingers, so as to revolve the plate and throw the upturned spring-lipsbeneath the lockingnotches of the flask, or the said plate may be turnedto clamp the flask by placing a small rod or other device between thestuds h, or across from flange to flange when there are two flanges, asin Fig. l, so as to obtain a leverage for turning the same.

In Fig. 4 the plate F is illustrated as having but two opposite lockingends or edges. It will be readily seen by the line of perspective inthis gure that the opposite locking ends or edges of said plate aretwisted reversely to each other, so as to form upwardlylbent locking lipor tongue portions adjacent to the opposite flanges H, which portionscorrespond, practically, to the construction of the series ofspring-lips G shown in the other figures and identically with the samein point of operation.

The construction, operation, and adaptation of the herein-describedclampis'nowthought to be apparent without further description.

`Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In a clamp for dental flasks, the combination, with the flask havingthe side posts provided with locking notches onshoulders, of aspring-metal clamping-plate pivoted upon IOO the top of Said flask andprovided with npadapted to engage said looking` shoulders or turned lipsadapted to engage sail locking notches, and operating-flanges,snbstnntmlly shoulders ornotchesnbstantiallyas set forth. as set forth.

2. In a, clamp for dental asks, the coxnbi- In testimony that I claimthe foregolng ns 5 nation, with the msk having the sido posts my own Ivhave hereto affixed my signature In 15 provided with locking1 notches orshoulders the presence ot' two Witnesses.

and :L top perforation or recess, of :L movable MORGAN RII'EES BANKSCREERY. Spring-metal clamping-plate having t pivot fitnessesz Stud orpiu engaging said top perforation or II. A.*ENGLEHART9 1o recess, aseries of npturned spring locking-lips C. J. BLMR.

